package com.example.yls.wuziqi;

import android.content.Context;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Point;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by yls on 2018/6/13.
 */

public class WuziqiPanel extends View {
    private int mPanelWidth;
    private float mLineHeight;
    private int Max_Line =10;
    private Paint mpaint = new Paint();

    private Bitmap mWhitePiece;
    private Bitmap mBlackPiece;

    private float radioPieceOfLineHeight = 3*1.0f/4;

    private boolean mIsWhite = true;
    private ArrayList<Point> mWhiteArray = new ArrayList<>();
    private ArrayList<Point> mBlackArray = new ArrayList<>();


    private boolean mIsGameOver;
    private boolean mIsWhiteWinner;
    private int MAX_COUNT_IN_LINE = 5;

    public WuziqiPanel(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        setBackgroundColor(0x44ff0000);
        init();
    }

    private void init() {
        mpaint.setColor(0x88000000);
        mpaint.setAntiAlias(true);
        mpaint.setDither(true);
        mpaint.setStyle(Paint.Style.STROKE);

        mWhitePiece = BitmapFactory.decodeResource(getResources(),R.drawable.stone_w2);
       Log.e("mwhite", String.valueOf(mWhitePiece));
        mBlackPiece = BitmapFactory.decodeResource(getResources(),R.drawable.stone_b1);
        Log.e("mblack", String.valueOf(mBlackPiece));
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
        int widthMode = MeasureSpec.getMode(widthMeasureSpec);

        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
        int heightMode = MeasureSpec.getMode(heightMeasureSpec);

        int width = Math.min(widthSize,heightSize);
        if(widthMode==MeasureSpec.UNSPECIFIED){
            width =heightSize;

        }else if(heightMode==MeasureSpec.UNSPECIFIED){
            width =widthSize;
        }
        setMeasuredDimension(width,width);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);

        mPanelWidth = w;
        mLineHeight = mPanelWidth *1.0f /Max_Line;

        int pieceWidth = (int) (mLineHeight * radioPieceOfLineHeight);
        Log.e("mwhite2", String.valueOf(mWhitePiece));
        mWhitePiece = Bitmap.createScaledBitmap(mWhitePiece,pieceWidth,pieceWidth,false);

        mBlackPiece = Bitmap.createScaledBitmap(mBlackPiece,pieceWidth,pieceWidth,false);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if(mIsGameOver) return false;

       int action = event.getAction();
       if(action == MotionEvent.ACTION_UP){
            int x = (int) event.getX();
            int y = (int) event.getY();

            Point p = getValidPoint(x,y);
            if(mWhiteArray.contains(p) || mBlackArray.contains(p)){
                return false;
            }
            if(mIsWhite){
                mWhiteArray.add(p);
            }else{
                mBlackArray.add(p);
            }
            invalidate();
            mIsWhite = !mIsWhite;

       }

        return true;
    }

    private Point getValidPoint(int x, int y) {

        return new Point((int)(x/mLineHeight),(int)(y/mLineHeight));

    }



    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        drawBoard(canvas);
        drawPieces(canvas);
        checkGameOver();
    }

    private void checkGameOver() {
       boolean whiteWin =  checkFiveInLine(mWhiteArray);
        boolean blackWin =  checkFiveInLine(mBlackArray);

        if(whiteWin || blackWin){
            mIsGameOver = true;
            mIsWhiteWinner = whiteWin;

            String text = mIsWhiteWinner ? "白棋胜利" : "黑棋胜利";
            Toast.makeText(getContext(),text,Toast.LENGTH_SHORT).show();
        }
    }

    private boolean checkFiveInLine(List<Point> points) {
        for(Point p : points){
            int x = p.x;
            int y = p.y;
           boolean win =  checkHorizontal(x,y,points);
           if(win) return true;
           win = checkVertiacl(x,y,points);
            if(win) return true;
            win = checkLeftDiagonal(x,y,points);
            if(win) return true;
            win = checkRightDiaonal(x,y,points);
            if(win) return true;


        }
        return false;
    }

    private boolean checkHorizontal(int x, int y, List<Point> points) {

        int count = 1;
        //左
        for(int i=1;i<MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x-i,y))){
                count++;
            }else {
                break;
            }

        }
        if(count == MAX_COUNT_IN_LINE) return true;
        //右
        for(int i=1;i<MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x+i,y))){
                count++;
            }else {
                break;
            }

        }
        if(count == MAX_COUNT_IN_LINE) return true;
        return false;
    }

    private boolean checkVertiacl(int x, int y, List<Point> points) {

        int count = 1;
        //上
        for(int i=1;i<MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x,y-i))){
                count++;
            }else {
                break;
            }

        }
        if(count == MAX_COUNT_IN_LINE) return true;
        //下
        for(int i=1;i<MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x,y+i))){
                count++;
            }else {
                break;
            }

        }
        if(count == MAX_COUNT_IN_LINE) return true;
        return false;
    }
    private boolean checkLeftDiagonal(int x, int y, List<Point> points) {

        int count = 1;
        //上
        for(int i=1;i<MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x-i,y+i))){
                count++;
            }else {
                break;
            }

        }
        if(count == MAX_COUNT_IN_LINE) return true;
        //下
        for(int i=1;i<MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x+i,y-i))){
                count++;
            }else {
                break;
            }

        }
        if(count == MAX_COUNT_IN_LINE) return true;
        return false;
    }
    private boolean checkRightDiaonal(int x, int y, List<Point> points) {

        int count = 1;
        //上
        for(int i=1;i<MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x-i,y-i))){
                count++;
            }else {
                break;
            }

        }
        if(count == MAX_COUNT_IN_LINE) return true;
        //下
        for(int i=1;i<MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x+i,y+i))){
                count++;
            }else {
                break;
            }

        }
        if(count == MAX_COUNT_IN_LINE) return true;
        return false;
    }

    private void drawPieces(Canvas canvas) {
        for(int i=0,n=mWhiteArray.size();i<n;i++){
            Point whitePoint = mWhiteArray.get(i);
            canvas.drawBitmap(mWhitePiece,
                    (whitePoint.x + (1-radioPieceOfLineHeight)/2)*mLineHeight,
                    (whitePoint.y + (1-radioPieceOfLineHeight)/2)*mLineHeight,
                    null
                    );
        }
        for(int i=0,n=mBlackArray.size();i<n;i++){
            Point blackPoint = mBlackArray.get(i);
            canvas.drawBitmap(mBlackPiece,
                    (blackPoint.x + (1 - radioPieceOfLineHeight)/2)*mLineHeight,
                    (blackPoint.y + (1- radioPieceOfLineHeight)/2)*mLineHeight,
                    null
            );
        }
    }

    private void drawBoard(Canvas canvas) {
        int w = mPanelWidth;
        float lineHeight = mLineHeight;
        for(int i=0;i<Max_Line;i++){
            int startX = (int) (lineHeight/2);
            int endX = (int) (w-lineHeight/2);
            int y = (int) ((0.5+i)*lineHeight);
            canvas.drawLine(startX,y,endX,y,mpaint);
            canvas.drawLine(y,startX,y,endX,mpaint);
        }

    }

    public void start(){
        mWhiteArray.clear();
        mBlackArray.clear();
        mIsGameOver =false;
        mIsWhiteWinner = false;
        invalidate();

    }
    private static final String INSTANCE = "instance";
    private static final String INSTANCE_GAME_OVER = "instance_game_over";
    private static final String INSTANCE_WHITE_ARRAY = "instance_white_array";
    private static final String INSTANCE_BLACK_ARRAY = "instance_black_array";

    @Nullable
    @Override
    protected Parcelable onSaveInstanceState() {
        Bundle bundle = new Bundle();
        bundle.putParcelable(INSTANCE,super.onSaveInstanceState());
        bundle.putBoolean(INSTANCE_GAME_OVER,mIsGameOver);
        bundle.putParcelableArrayList(INSTANCE_WHITE_ARRAY,mWhiteArray);
        bundle.putParcelableArrayList(INSTANCE_BLACK_ARRAY,mBlackArray);
        return bundle;


    }

    @Override
    protected void onRestoreInstanceState(Parcelable state) {
        if(state instanceof Bundle){
            Bundle bundle = (Bundle) state;
            mIsGameOver = bundle.getBoolean(INSTANCE_GAME_OVER);
            mWhiteArray = bundle.getParcelableArrayList(INSTANCE_WHITE_ARRAY);
            mBlackArray = bundle.getParcelableArrayList(INSTANCE_BLACK_ARRAY);
            super.onRestoreInstanceState(bundle.getParcelable(INSTANCE));
            return;
        }

        super.onRestoreInstanceState(state);
    }
}
